NTMakefile:
replace ntlm/inquire_cred.c with ntlm/creds.c
add ntlm/inquire_sec_context_by_oid.c
add ntlm/iter_cred.c
add missing GSSAPI_CALLCONV function descriptors
conditionalize use of kcm functions with HAVE_KCM
Change-Id: Ia693f67304405bd540c57db8858c13314cd60322